Render suddently coming out black in Blender 2.91
Check your Scene settings, you've chosen your house as Camera, select your camera instead. Selecting another object than a camera may be useful sometimes to see what an object is pointing towards (for example select a light and press Ctrl0):

As for the light, it's your world that lights up your object, open a Shader Editor, switch to World and see, you have a Sky Texture plugged into the Output.

If you don't want the world to light up the scene you can unplug its nodes or play with its Ray Visibility settings:

Edit: Additional edge loop in order to sharpen your roof (but Subdivision Surface modifier doesn't seem necessary here, it is supposed to round the shape with virtual subdivisions):

To get a proper displacement for the material called Pantiles you need to unable Material &gt; Settings &gt; Surface &gt; Displacement &gt; Displacement Only. But as your topology is not very good the Subdivision Surface modifier subdivision won't be very good either, you'd better rework the topology a bit so that it is made of regular square faces: